In which of the following reactions does H 2 O 2 act as a reducing agent-A- PbO 2 s - H 2 O 2 aq - P bO s - H 2 O l - O 2 g B- Na 2 SO 3 aq - H 2 O 2 aq - Na 2 SO 4 aq - H 2 O l C- 2 KI aq - H 2 O 2 aq - 2 KOH aq - I 2 s D- KNO 2 aq - H 2 O 2 aq - KNO 3 aq - H 2 O l

The correct option is A PbO_2(s)+H_2O_2 (aq) → PbO(s)+H_2O(l)+O_2(g)PbO_2 → PbO change in O.S is +4 to +2. Hence, H_2O_2 acts as a reducing agent in this react ...

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Standard XII

Chemistry

Properties of Water

In which of t...

Question

In which of the following reactions does $H_{2} O_{2}$ act as a reducing agent?

P b O_{2} (s) + H_{2} O_{2} (a q) \to P b O (s) + H_{2} O (l) + O_{2} (g)

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N a_{2} S O_{3} (a q) + H_{2} O_{2} (a q) \to N a_{2} S O_{4} (a q) + H_{2} O (l)

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2 K I (a q) + H_{2} O_{2} (a q) \to 2 K O H (a q) + I_{2} (s)

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K N O_{2} (a q) + H_{2} O_{2} (a q) \to K N O_{3} (a q) + H_{2} O (l)

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Solution

The correct option is A $P b O_{2} (s) + H_{2} O_{2} (a q) \to P b O (s) + H_{2} O (l) + O_{2} (g)$
$P b O_{2} \to P b O$
change in O.S is +4 to +2. Hence, $H_{2} O_{2}$ acts as a reducing agent in this reaction.

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Similar questions

H_{2} O_{2}

is decomposed to

H_{2} O

and

O

, in the following sequence of reactions :
i)

H_{2} O_{2 (a q)} + I_{(a q)}^{-} \to H_{2} O_{(l)} + I O_{(a q)}^{-}

ii)

H_{2} O_{2 (a q)} + I_{(a q)}^{-} \to H_{2} O_{(l)} + O_{2} (g) + I O_{(a q)}^{-}

(a) Write the chemical equation for the overall reaction.
(b) Identify the species that acts as a catalyst.
(c) Identify the intermediate.

Q. Complete the following chemical reactions. Classify the below into (a) hydrolysis, (b) redox and (c) hydration reactions.

(i)

P b S (s) + H_{2} O_{2} (a q) \to

(ii)

M n O_{4}^{-} (a q) + H_{2} O_{2} (a q) \to

(iii)

C a O (s) + H_{2} O (g) \to

(iv)

A l C l_{3} (g) + H_{2} O (l) \to

(v)

C a_{3} N_{2} (s) + H_{2} O (l) \to

Q. Balance the following redox reactions by ion-electron method.

H_{2} O_{2} (a q) + F e^{2 +} (a q) \to F e^{3 +} (a q) + H_{2} O (l)

(in acidic solution)

Complete the following chemical reactions.
$P b S_{(s)} + H_{2} O_{2 (a q)} \to$

$M n O_{4 (a q)}^{-} + H_{2} O_{(g)} \to$

$C a O_{(s)} + H_{2} O_{(l)} \to$

$A l C l_{3 (g)} + H_{2} O_{(l)} \to$

$C a_{3} N_{2 (s)} + H_{2} O_{(l)} \to$
Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

Q. In which of the following reactions

H_{2} O_{2}

acts as a reducing agent?

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In which of the following reactions does H2O2 act as a reducing agent?

The correct option is A PbO2(s)+H2O2(aq)→PbO(s)+H2O(l)+O2(g)PbO2→PbO change in O.S is +4 to +2. Hence, H2O2 acts as a reducing agent in this reaction.

In which of the following reactions does $H_{2} O_{2}$ act as a reducing agent?

The correct option is A $P b O_{2} (s) + H_{2} O_{2} (a q) \to P b O (s) + H_{2} O (l) + O_{2} (g)$
$P b O_{2} \to P b O$
change in O.S is +4 to +2. Hence, $H_{2} O_{2}$ acts as a reducing agent in this reaction.